estes



(NoModeL) H. R. ESTES.

SASH LOCK.

No. 453,553. Patented June 2,1891.

7% H. R ,Estasv JW Bff wf/arf l STATES PATENT OFFICE.

IIIIBERT R. ESTES, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-THIRD TO EUGENE E. ROBERTS, OF SAME PLACE.

SAS H LO C K SPECIFICATION forming part of Letters Patent No. 453,553, dated June 2, 1891.

Application filed December 30, 1890. Serial No. 376,256. (No model.)

To (ZZ whom it may concern:

Be it known that I, HUBERT R. ESTES, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Automatic lVindow-Locks, of Which the followingis a full, clear, and exact description, reference beinghad to the accompanying' drawings,forming` part of this specifica-tion.

My invention relates to a simple and effective device for automatically looking a windowsash; and my invention consists in features of novelty hereinafter fully described, and pointed out in the claim.

Figure I is a perspective view illustrative of my invention. Figs. II and III are side elevations of the lock, showing a portion of the meeting-rails of the upper and lower window-sash, the two figures showing,` the parts in different positions.

Referring to the drawings, l represents the meeting-rail of the upper sash, and the meeting-rail of the lower sash. 3 represents a bracket secured to the rail 1, and to the upper end of Which is pivoted at a swingingplate 5.

(3 represents an unweighted stop-pin on the plate 5, and 7 a combined stop and operating weighted pin on the plate 5. The pin 6 is on one side of the bracket 3 and the weighted pin 7 on the other side of the bracket.

8 represents an arm secured to the rail 2 and Which extends over the rail l.

The operation of the device is as follows: The normal position of the plate 5 is shown in Fig. III, With the Weighted stop-pin 7 resting against the bracket 3. Supposing the lower sash to be open or raised, the arm 8 will, as the sash is closed, come against one side of the plate 5, as shown in Figz-II, and swing` the plate into the position shown in Fig. II, oarrying the counterbalance -Weight away from the bracket 3 and causing the pin G to enter a notch 9 in the bracket 3, so that the edge of the plate carrying the pin O Will be flush or in line With the wall of the bracket.

Then the sash has been entirely closed, the counterbalance-weight 7 will cause the plate 5 to swing'to the position shown in Fig's. I and III, so that the arm 8 will be under the lower end of the plate, and the sash thus permanently looked in its closed position, and 5o when it is desired to open the sash again it may be done by pressing against the inner side of the weighted pin 7 to swing` the plate 5 into the position shown in Fig. II and permit the arm 8 to pass.

It sometimes happens that asash cannot be completely closed, and so as to lock it under this condition of affairs I make the lower end of the plate 5 rounding, as shown,so that whether the lower sash is quite closed or not 6o the arm S will be engaged by the lower end of the plate, and the sash thus held from upward movement, the eounterbalance-weight serving always to keep the plate swung in a direction toward the arm 8.

A lock of this kind can be cheaply produced, will effectually perform its functions, and is entirely automatic in its locking action.

I claim as my invention* In an automatic lock for windows, the com- 7o bination of a bracket 3, secured to one of the meeting-rails and provided With a notch 9, an arm 8, secured t0 the other meeting-rail, a swinging plate 5, givoted at et to said bracket 3 and adapted to engage with the arm 8, an unweighted stop-pin 6 on one side of the plate 5, adapted to engage in the notch 9 in said bracket 3, and a combined stop and operating weighted pin 7, secured to the other side of said plate and adapted to engage with So the edge of the bracket- 3, Whereby said lock is automatically closed by said weighted pin 7 and can be opened thereby, as herein set forth.

IIUBERT R. ESTES.

In presence of- E. S. KNIGHT, A. M. EBERsoLE. 

